Trudie Hall, 23, disappeared on July 28, 2010 after coming to the mainland for a doctor's appointment. She stayed in a Hyannis hotel and rented a car, but vanished afterward. The car had traces of blood and bullet casings, but no trace of Hall was found until last week, authorities said.

"Though Trudie will never speak again, by finding her, she has told us much. Among other things, she has told us how many times she was shot and with what kinds of bullets," said Cape and Islands District Attorney Michael O'Keefe, who said Hall, who was four months pregnant, was shot multiple times.

O'Keefe said the remains were found in a wooded area near Falmouth by a man walking his dog last week, and he said the location where the bones were discovered is significant to the case. He said an autopsy was performed by the medical examiner's office and Hall was identified through dental records and some articles of jewelry.

O'Keefe said he would not release information about the kind of gun and bullets used, because the investigation is ongoing. He would not say if his office has any suspects in the case or whether Hall was shot where her remains were found.

"In the fullness of time, this case will be resolved and the person or person involved in Trudie's death will be brought to justice," O'Keefe said.

The district attorney said it is still unclear whether there would be any other charges filed in connection with the fact that Hall was pregnant. She was carrying the child of a married man who has a criminal record when she was killed. Police have questioned the man and searched his home.

"Trudie was at that point in her pregnancy, which is really on the bubble in Massachusetts, as to whether or not a separate charge of murder or some other charge would be appropriate," he said.

Hall was also married to two other men at the time.

The young Jamaican woman's family lives in Nantucket, and they hired a private investigator in the hopes of finding answers. O'Keefe said it was Hall's mother, Vivienne Walker, who reported her daughter missing the day after Hall disappeared.

Crime scene specialists spent the weekend investigating the discovery, and O'Keefe said someone may have knowingly or unknowingly aided Hall's killer and they would like to talk to that person.

O'Keefe asked that anyone with any information contact investigators at 508-790-5799.